Rendering tank door



A July 7, 1931. E. w. MccuLL'ouGH RENDERING TANK DOOR Filed NOV. 8, 1926 H. El. o,

Patented July 7, 1931 jnini-fran Par-ENT orties ERVIN l" MGGULLOUGH, OF INDIANAPOLIS, INDIANA nnnnnnine mank noon .Applicaton- 1edz.NoYember 8,1926. Serial No. 147,096.

This invention relateszto a tank.

The chief .object -of-this invention isto provide af tank .with suitable vmeans for, drainably sustaining awload of apeculiar charfacter, therebyfpermittin-g the-saturation and drainage thereof through saidload sustaining' `means without substantial interference, the-clogging of the yload sustaining means, or

`the escape ofany v appreciable aanount of the ssolrds contents.

,The chief feature of the invention consists in the formation of a ohain-bcnform- Y ingA opening ina tank ofthe characterindicated rand associating therewith -a perforated :load-supporting plate and an i opening closure, said closure and plate being in-spaced Yfao parts being shown `in .section to illustrate other partslin detail. Fig. -2 is a transverse sectionahviewf of the invention taken inthe plane. of 2- 2 in iF- ig 1f and=inthe direction vo'f the-arrows. Fig. 3 isia perspective view of one forni ofthe loadsustaining d-rainer. .Fig. l is afront elevational view thereof. :Pigna isa central sectional View, of a modified form of the invention.

Thisinvention is an improvement upon, andan extension of the-invention disclosed originally `in application. Serial No. 653,403, filed July 23, 1923, entitled Garbage reducer, and Visofsuch acharaoter thatit is `more :satisfactory for operation in agarloagel tankvage ,extraction process such as disclosed in `the pending application -Serial No. I63,163, ,file dzOctober T17," 1925,l and entitled Garbage ,when the shaft .rotated by an vannular rack 241 which meshes .with a pinion 25 driven by a speed reduc- 4'itaiikage extraction than the invention ge Ynericallyclaimed and described in the=afore said. garbage reducer application. rPhe pres .ent application is a continuation inpart of copending application Serial No. 63,163.

vIn the drawings indicates a suitable framework which rigidly supports a vertically disposed cylindrical tank having a lower portion 11 and the upper portion 12. 'Lower portionllis providedwitli an inner shell 11.3. wherebyga heating jacket'14 is d provided therebetween which encloses I substantially the lower half of the tank. The two shells areprovided with' lower end closures 16 and 17 which form a heating space 18 therebetween. A suitable spacing .means 19 maintains the two shells in-spaced relation in ad- `ditionto yother supporting means that may 'be provided. .rounds ,a rotatable sha-ft Said spacing means 19 sur- 20 extending from without the tank to within the same with its upper end-terminating in. an agitator y -construction includinghub 21, curved arms 22 `and agitator blades 23, 'said bladesbeing arrange-d parallel to each other and at different distances respectively from shaftQO so thatthey will track in individual paths 2O 'isrevol'ved Shaft 20 is tion mechanism 26, in turn driven by anelpectric motor or other suitable power means i controlled lines is adapted to supply, pressure in-the form of compressed air, steam or the like, to thertankforpressing, and the other isadapted toe'Xhaust or apply a vacuum to `vthe tank, he .valves being differentially operable. The upper portiontof the tank also is provided `with agage glass construction 35,

particularly for indicating the height of the extracting liquid in the tank supplied near the bottom thereof.

As shown clearly in Fig. 2, the jacket 14 has leading to it a plurality of supply lines 36 and a discharge line 37 including the trap 38, see Fig. 1, drains the same. The lower portion of the inner shell 13 is provided with supply lines 39 and steam or compressed air may be supplied to the tank contents through these pipes.

The tank near the bottom thereof is provided with an opening-defining and tubular frame 41 which includes a passage 42 in communication with a line 43 controlled by the valve 44. The tubular frame exterior opening is closed by a suitable door or closure plate 45 havingl multiple hinge construction for substantially forward movement of the door for a considerable distance, such movement being provided for clearance purposes. Said hinge includes ears 146, pivots 46 and 246 and links 346. Readily operable locking means 47 secure the closure or door 45 in closed relation with the frame 41. Attached to the door 45 and extending inwardly into the space formed by the frame are a plurality of abutments 48 to which is suitably secured load sustaining perforated plate means 49 in the form of a boxing including but four sides, the top and the side adjacent door 45 being open. The perforations of the boxing comprise a small number of large openings and a relatively large number of small openings.

Included within the boxing is a filtering medium. Such a suitable medium has been found to be boiled or softened excelsior. @ther softened fibrous material or softened shredded material will be satisfactory for the purpose. Specially arranged granular material may be employed. The device herein disclosed is particularly adaptable to the admission through line 43 of a solvent which under pressure is forced into the tankage and permeates the same, following which it is Withdrawn through the same line from the tankage with the solvent extracted constituent included'therein. The character of the permeable material is such that the majority of it is of considerable fineness and in the withdrawal of the solvent a considerable portion of the finer materials would be carried with it. The filtering or straining mechanism herein disclosed prevents such action, butdoes not introduce any considerable resistance to the free entrance and egress of the solvent to and from the tankage.

In Fig.` 3 the open face boxing comprises the front plate 49 which is curved to conform substantially to the cylindrical outline of the tank and complement the same. The two substantially parallel sides 50 and 51 are connected by a bottom 52. The other or back face is formed by the door 45 when the boxing is mounted upon said door as shown in F ig. 2. There is thus formed a filtering material containing boxing carried by the door and receivable in the chamber-forming opening in the` frame 41. Suitable filtering material as previouslyv described, consists of softened or boiled excelsior which is positioned in the boxing.

In Fig. 5 a modified form of t-he invention is illustrated in central section. A cover plate 53 is provided which is pivotally mounted in ears 54 formed in the boxing at opposite sides and bears upon the bracket or stop lug 55. Thus, the filtering material is completely enclosed in this form of the invention.

It will be readily appreciated that when the locking means 47 is released, said door can first be retracted axially of the opening to remove the boxing and thereafter swung laterally to completely exposethe opening without interference from the boxing or the door closure since in this form of the invention the boxing and door are unitary and simultaneously movable. The tankage there-f after may be removed from the tank by manual manipulation or mechanically by the operation of the agitator. The device heren described is peculiarly adaptable to garbage tankage extraction such as set forth inil the copending application Serial No. 63,163, filed October 17, 1925, and entitled Garbage tankage extraction. The form of filter arrangement including the load sustaining and .separating plate may, if desired, be employed 1n the standard rendering tank for the purpose set forth in the application Serial No. 698,106 and thus is an adequate substitution for the combination rendering tank disclosed 1n the application entitled Garbage reducer, Serial No. 653,403, filed July 23, 1923.

The invention claimed is:

1. In a Vgarbage extraction curved side wall and a discharge opening therein and a frame work therefor, a closure for said opening movably mounted-on said frame work, a one-piece apertured plate consist-ing of three sides and a bottom portion being mounted on said closure and so spaced therefrom as to be flush with the side walls of said tank, the middle one of the side walls of said plate being shaped to conform to the interior surface of the tank side wall, the said plate, closure and framework together formlng a chamber adapted to contain a filtering medium.

2. In a garbage extraction tank having a curved side wall with a discharge opening therein, a framework surrounding the openmg and constituting a passageway communicating with the tank through the opening, a closure for said passageway movably mounted for closing the framework definedl opening, a perforated plate shaped to conform to and forming a part of the interior of the tank side tank having a wall and in spaced relation to the closure, walls interposed between the closure and the plate forming a filtering Chamber within the passageway, a liltering medium in said chamber and movable with the closure, and oondut means for liquid flow communicating with the passageway and with the tank nterior through the filtering chamber.

In witness whereof, I have hereunto aixed my signature.

ERVIN W. MCCULLOUGH. 

